The provided pie charts manifest imformation about the proportion of five different books which were sold by a bookseller from 1972 to 2012.
Overall, it is evident that the adult fiction books were most popular as compared to other types of books in the given time period.
At the first glance, it is lucid that the proportion of adult fiction books was 20% in 1972 and 25% in 1992. After increasing sharply, it reached at 45% in 2012 which is the highest percentage. However, the percentage of children's fiction books was 20%, 22% and 25% in 1972, 1992 and 2012, respectively.
Moving further, the percentage of biography books hovered under 20% throughout the given time period which is the least percentage. Moreover, the proportion of travel books after increasing gradually from 15% in 1972 to 18% in 1992. In 2012, it decreased and stood at 10%. In terms of others books, 13 percent difference was seen that between 1972 and 2012. 
The provided pie charts manifest  
imformation
 about the proportion of five  
different
  books
 which  
were sold
 by a bookseller from 1972 to 2012. 
Overall
, it is evident that the adult fiction  
books
 were most popular as compared to other types of  
books
 in the  
given
 time period.
At the  
first
 glance, it is lucid that the proportion of adult fiction  
books
 was 20% in 1972 and 25% in 1992. After increasing  
sharply
, it reached at 45% in 2012 which is the highest  
percentage
.  
However
, the  
percentage
 of children's fiction  
books
 was 20%, 22% and 25% in 1972, 1992 and 2012,  
respectively
.
Moving  
further
, the  
percentage
 of biography  
books
 hovered under 20% throughout the  
given
 time period which is the least  
percentage
.  
Moreover
, the proportion of travel  
books
 after increasing  
gradually
 from 15% in 1972 to 18% in 1992. In 2012, it decreased and stood at 10%. In terms of others  
books
, 13 percent difference was  
seen
 that between 1972 and 2012.